JP2002315157A - Automotive relay box - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily cope with the change of the number of connection circuits of a power supply, fuses, and relays. SOLUTION: One relay housing part in which one relay is housed and one fuse housing part in which one fuse is housed are provided in parallel with each other in a housing. Further, a relay-fuse connecting bus-bar is housed in the housing. A fuse connecting terminal which is connected to the output side terminal of the fuse directly or via a junction terminal and made to protrude into the cavity of the fuse housing part, and a relay connection terminal which is connected to the terminal of the relay directly or via a junction terminal and made to protrude into the cavity of the relay housing part, are formed on the bus-bar. A plurality of cassette-type housings, having female locking parts and male locking parts which are formed on the facing outer surfaces of the housings and decouplably coupled with each other to lock, are provided. The required number of the housings are arranged in parallel with each other and the female and male locking parts of the adjacent housings are coupled with each other for assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a relay box for an automobile, and more particularly, to a relay box in which a relay and a fuse are mounted and the relay and the fuse are connected, the number of relays and fuses is increased or decreased. Even if there is, it can be easily handled.

[0002]

2. Description of the Related Art Conventionally, power supplies, fuses,
The connection structure of the relay is basically configured as shown in FIG. That is, the circuit C connected to the battery B is branched and connected to the input terminals H1 of the plurality of fuses H, and the output terminal H2 of each fuse H is connected to the input terminal L1 of the contact LP of the relay L and the input of the coil LC. The output terminal L3 of the contact point LP of each relay L is connected to the load circuit C1, and the output terminal L4 of the coil LC is connected to the switch circuit C2.

A circuit for connecting the above power supply to the input side of a plurality of fuses, connecting the output side of the fuse to the input side of the relay, and connecting the fuse and the relay has conventionally been shown in FIG.
(A) It is comprised in the relay box 1 shown to (B). In the relay box 1, a housing 2 is provided with a required number of relay housings 3 such as four and a plurality of fuse housings 4 such as two sets of four housings. Terminal housings 3a and 4a are provided below the relay housing 3 and the fuse housing 4, respectively. Terminals T1 connected to both ends of the electric wire w are connected to the terminal housing 3a at the lower part of the fuse housing and the lower part of the relay housing. And the output side of the fuse and the input side of the relay are connected via an electric wire w. In some cases, a bus bar is housed in the housing 2 instead of the electric wire, and the output side of the fuse is connected to the input side of the relay.

In some cases, a fuse housing for mounting one fuse and a relay housing for mounting one relay are provided, components are provided for each part, and required parts are combined in a required number. .

[0005]

As described above, if the required number of relay accommodating portions and fuse accommodating portions are formed in the housing 2 of one relay box 1, the required number of relays and fuses is reduced. If it increases, it becomes necessary to reshape the housing 2. In that case, it is necessary to recreate a mold for molding the housing, which increases the cost, and also requires a period of preparation, which makes it impossible to respond quickly. In order to cope with this problem even if the number of fuses and relays is slightly increased, a large number of relay housings and fuse housings may be provided in advance.
In this case, an unnecessary space for mounting the relay and the fuse tends to be generated, and there is a problem that the relay box becomes larger than necessary.

On the other hand, when the relay and the fuse described later are formed in separate housings, one by one, and these are combined, the number of assembling steps becomes extremely large, which requires a lot of work, and the relay and the fuse are connected by electric wires. In this case, the number of parts and the number of labors also increase.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to make it possible to easily cope with the required number of relays and fuses, and to reduce the size and the number of assembly operations. And

[0008]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides one relay accommodating portion for mounting one relay and one fuse accommodating portion for mounting one fuse in a housing. And a fuse connecting terminal portion for receiving a bus bar for connecting a relay and a fuse, and projecting into the cavity of the fuse accommodating portion and connecting to the output terminal of the fuse directly or via a relay terminal. And a relay connection terminal portion protruding into the cavity of the relay accommodating portion and connecting to the terminal of the relay directly or via a relay terminal.

A plurality of cassette type housings having a female lock portion and a male lock portion which are detachably fitted to and lock-coupled to the opposing outer surfaces of the housing are provided. The male and female lock portions of the housing are connected and assembled.

In the connection circuit between a fuse and a relay for a vehicle, as shown in FIG.
Most of the circuits are connected in one-to-one correspondence. Therefore, if a housing for mounting one fuse and one relay is provided, a relay box having a required number of fuses and relays can be formed by combining the housings. Can be configured. A bus containing a fuse and a fuse for connecting an output terminal of the fuse and an input terminal of the relay is housed in the housing in which a housing for the fuse and the relay is provided in a one-to-one manner. When the relay is attached and connected to the relay / fuse connection bus bar, the work of connecting with a conventional electric wire can be eliminated, and the number of operations can be greatly reduced.

Further, if the fuse accommodating portion and the relay accommodating portion are arranged side by side in a one-to-one relationship and the relay / fuse connecting bus bar is arranged below the cavity, one housing does not increase in size. Even when these housings are combined, it is possible to reduce the size of the conventional relay box shown in FIG. 7 in which cavities in which fuses and relays cannot be mounted as a whole may occur.

Further, when there is a circuit that does not connect the relay to the fuse, the relay is not attached to the relay cavity, and the terminal connected to the electric wire terminal is connected to the relay / fuse connection bus bar by pressure connection. ,
The above housing can be used.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a relay box 10 according to a first embodiment. The relay box 10 is formed by combining five cassette type housings 11 shown in FIG. 2 in parallel.

In each housing 11, one relay accommodating portion 12 for attaching one relay and one fuse accommodating portion 13 for attaching one fuse are connected in parallel via a connection frame portion 11a. Molding. The relay housing 12 includes four cavities 12a to 12d, and the cavities 12a to 12d are provided at positions where four terminals 31A to 31D of one relay 30 are inserted. Further, the fuse accommodating portion 13 has two cavities 13a, 1
3b, each of the cavities 13a and 13b has a fuse 3
5 are provided at positions where the two terminals 36A and 36B are inserted.

The cavity 12a of the relay housing 12
To 12d, the cavities 13a, 1
3b, as shown in FIG. 3 (A), has a busbar housing space S with a lower end opening at the lower part, and a relay / fuse connection busbar (hereinafter abbreviated as busbar) 15 shown in FIG. 3 (B) from the lower end opening. It can be inserted and locked in the busbar accommodation space S.

The bus bar 15 is composed of a vertical bus bar vertically arranged in the bus bar accommodating space S, and has a fuse connection terminal portion 15b protruding from one end of a base portion 15a. As shown in FIG. The fuse 13 protrudes into the cavity 13a. The fuse connection terminal portion 15b is of a pressure contact type in which a pressure contact slot 15c is cut out from the tip.
No. 5 output side terminal 36A is inserted into the slot 15c so as to be press-connected.

A first terminal portion 15d and a second terminal portion 15e for relay connection are protruded from a base portion 15a of the bus bar, and the first and second terminal portions 15d and 15e are formed in tabs having a low height. And Further, the second terminal portion 15e on the other end side of the bus bar 15 is bent 90 degrees together with the base portion 15a. The first terminal 15d is disposed in the cavity 13a of the relay housing 13, and the second terminal 15e is disposed in the cavity 13c.
The terminal portions 15d and 15e have female-female relay terminals 16, 1
7 and the relay terminals 16 and 17 are connected to the contact-side input terminal 31A and the coil-side input terminal 3A of the relay 30.
1D is fitted and connected.

The above-mentioned relay housing 12 and fuse housing 1
3 is provided on the housing 11 provided on a one-to-one basis.
And a male lock portion 19 are protruded. The female lock portion 18 has a shape in which a lock claw 18c is protruded from the center of both sides frames 18a and 18b whose tips are bent in the approaching direction, while the male lock portion 19 has both ends frames 19 whose tips are bent in the separating direction.
The lock arm 19c has a shape protruding from the center of each of a and 19b. When the housing 11 is juxtaposed, the male and female lock portions 18 and 19 are inserted into the female lock portion 18 from above, and the lock arm 19c is bent to lock the lock claw 18c to lock the two. I am trying to be.

Further, L-shaped engaging pieces 20 and 21 which are bent in a substantially direction are also protrudingly provided on the opposing outer surfaces of the housing on the side of the fuse accommodating portion 13. When the housings 11 are juxtaposed, the engagement pieces 20 and 21 are engaged with the bent portions thereof being overlapped.

A cassette type housing 1 in which the relay accommodating portion 12 and the fuse accommodating portion 13 having the above-described structure are provided in a one-to-one relationship.
1, as shown in FIG. 1, a required number of housings 11 are arranged in a side-by-side state, and adjacent housings 11 are sequentially locked and locked by male and female lock portions 18 and 19 to assemble a relay block 10. In the relay block 10 of the present embodiment, as shown in FIG.
Are combined in a parallel state to be integrated.

As described above, the fuse and the relay are 1
Since most circuits are connected in one-to-one correspondence, a required number of circuits in which fuses and relays are connected in one-to-one correspondence can be provided by sequentially coupling housings 11 corresponding to the number of circuits. . In other words, the relay block 10 including only the required number of circuits can be easily formed. In this way, the circuit can be easily increased or decreased by simply increasing or decreasing the number of connected housings, and the conventional integrated housing also creates unnecessary space where fuses and relays cannot be installed. In the embodiment, since such an unnecessary space is not generated, the size of the relay block can be reduced. Also, one-on-one
The fuses and relays connected by the cable are not connected via wires as in the past, but are connected by busbars housed in the housing, eliminating the need for connection work using wires and reducing labor. be able to.

FIG. 5 shows another embodiment. When a circuit other than a regular circuit in which the fuse and the relay shown in FIG. 1 are connected in a one-to-one manner is required, a relay fuse having this circuit is required. The block 50 is provided separately and used in parallel with the relay block 10 similar to the first embodiment. The relay / fuse block 50 is provided with a required number of fuse accommodating portions 50a and 50b. This relay / fuse block 50 has a soldering 1
It is also possible to provide a lock portion for locking and coupling with one male and female lock portion and integrally connect them.

[0023]

As is apparent from the above description, according to the present invention, a cassette type of a standard specification in which a fuse accommodating portion for attaching one fuse and a relay accommodating portion for attaching one relay are formed one-to-one. Since these cassette type housings are sequentially connected by the required number of circuits in which fuses and relays are connected one-to-one, a relay block having a required circuit can be easily provided. Can be provided. In addition, if the number of circuits increases or decreases, it can be dealt with only by increasing or decreasing the number of connected housings, and it is not necessary to create a new relay block.

Further, only the housings provided with the necessary number of fuse housings and relay housings are combined,
Since there is no empty space in which fuses and relays cannot be mounted, downsizing can be achieved as compared with a conventional relay box having a large number of fuse housings and relay housings.

Furthermore, since the output side of the fuse and the relay input side are connected by a relay fuse connection bus bar accommodated in the housing, the connection work can be made unnecessary as compared with the case where the connection is made via electric wires. Thus, the number of labors and the number of parts can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view of a relay block according to an embodiment of the present invention.

FIGS. 2A and 2B show each housing constituting the relay block, FIG. 2A is a drawing showing a housing, a relay and a fuse attached to the housing, and FIG. 2B is a side view.

FIG. 3A is a cross-sectional view of the housing, and FIG. 3B is a drawing showing a relay fuse connecting bus bar and a medium-diameter terminal housed in the housing.

FIG. 4 is a plan view showing an arrangement of bus bars housed in a housing.

FIG. 5 is a plan view showing another embodiment.

FIG. 6 is a drawing showing a basic connection circuit of a power supply, a fuse, and a relay in an automobile.

FIG. 7A is a plan view of a conventional relay block,
(B) is an enlarged view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Relay block 11 Housing 12 Relay accommodating part 12a-12d Cavity 13 Fuse accommodating part 13a, 13b Cavity 15 Relay fuse connecting bus bar 15b Fuse connecting terminal part 15d, 15e Relay connecting terminal part 16, 17 Relay terminal 18 Female lock part 19 Male Lock part 20, 21 Engagement piece 30 Relay 35 Fuse

Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat II (reference) H05K 5/02 H01H 85/22 CF term (reference) 4E360 AB12 AB18 AB20 AB24 AB25 EA03 EC12 ED03 ED13 ED14 ED17 ED23 ED27 EE02 GA04 GA06 GA46 GA53 GB93 5G361 AA06 AB12 AC02 AD01 AE01 BA02 BB01 BB03 BC01 BC02 5G502 AA01 BA05 CC03 CC16 CC24

Claims (2)

[Claims] 1. A housing for mounting one relay, and one fuse housing for mounting one fuse in a housing, and a bus bar for connecting a relay and a fuse. A fuse connecting terminal portion protruding into the cavity of the fuse accommodating portion and connected to an output terminal of the fuse directly or via a relay terminal; and a relay terminal projecting into the cavity of the relay accommodating portion. A relay box for an automobile, wherein the relay box has a relay connection terminal portion connected directly or via a relay terminal. 2. A plurality of cassette-type housings having a female lock portion and a male lock portion which are detachably fitted to and lock-coupled to opposing outer surfaces of the housing are provided. 2. The automobile relay box according to claim 1, wherein the male and female lock portions of the adjacent housings are connected and assembled.